Primer.



F. O. KILGORE.

PRIMER.

APPLICATION FILED DEC. 28. I916.

Patented July 10, 1917.

0M 0 u k cu M E a m W IN n Z Hl nn\ 0 WY Wm M I MM mm n 1 I 2 y. t. IlM/IIL m FREDERICK 0. KILGQRE, 0F BOSTON, MASSACHUSETTS, ASSIGNOR TOSPRAY PRIMER COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

PRIMER.

Specification of Letters Patent.

Patented July 10, 1917.

Application filed December 28, 1916. Serial No. 139,384.

To all whom it may conce n:

Be it known that I, FREDERICK' O; KIL- GORE, a citizen of the United States, and a resident of Boston, in the county of Suffolk The apparatus consists essentially 'of a pump providedwith a cylinderand a piston reciprocating therein, and said pistonin accordance with the present lnvention has connected with it a valve,which controls com- 'inunication betweenithe said cylinder and an I outlet passage designed to be connected with the motor to be primed, said valve being arranged to cut off the cylinder from said outlet passage on the suction stroke of the piston in said cylinder and to seal the gasolene in the cylinder againstthe action of the motor. The valve may and preferably will also cooperate with a fluid inlet for the cylinder, as will be described. These and other features of this invention will be pointed out in the claims at the end of this specification.

Figure 1 represents a portion of an automobile provided with a priming apparatus embodying this invention.

Fig. 2, a longitudinal section of the apparatus with the piston at the end of its suction stroke.

Fig. 3, a like section with the piston near the end of its discharging stroke, and

Fig. 4, a section on the line 4 -4, Fig. 2.

Referring to the drawing, a represents the cylinder of a pump, which is provided at one end with the head I) and between its ends with a transverse Wall or head 0, and at its opposite end with a removable cap d. The transverse wall or head 0 cooperates with the head I) and cap d to form chambers 10, 12 on opposite sides of the wall 0, which are in open communication with each other by means of openings 13, extended through the wall a, see Fig. 4. y

The wall 0 is also provided with central opening 15 through which is extended a rod 16 attached to or forming part of the piston rod 17 of a piston'18 located in the cylinder a and movable in the chamber 10. The rod 16 has mounted upon it within the chamber 12, a valve 20, which moves in unison with the piston and controls one and preferably two ports orpassages 21, 22 formed in the wall 0 and extended from the rear face of said wall to the outside of'the cylinder a. The passages 21, 22 form inlet and outlet passages for the cylinder'a, and in the presentinstance they communicate with hollow bosses 24, 25, extended laterally from the cylinder 0; and forming casings for inlet and outlet check valves 26, 27 preferably made as herein shown and each comprising a metal disk provided with a stem and having a leather facing. The casing 24 for the inlet valve 26 is threaded for connection thereto of a pipe 30, and the casing 25 of the outlet valve 27 is threaded for the connection there with of a pipe 31. y l

V The inlet valve 26 cooperates with a valve seat formed by the end of a bushing 32 inserted into the hollow boss 24, and said valve is seated by a light spring 33 located within the saidhollow boss.

The outlet valve 27 cooperates with a valve 7 seat formed by the end wall of the hollow the Valve 20. The piston rod 17 is extended. 7

through the head b of the cylinder a and through a hub 37 attached to the head Z), and is encircled within said hub by a spring 38, which bears against the end wallof the hub and at its other end-against a shoulder 39 on the piston rod, which latter may be provided at its outer end with a detachable nut or head 40.

The, cylinder a is represented in Fig. 1 as affixed to the dasher 42 of an automobile 43, which is effected as herein shown by extending the hub 37 through a hole in the dasher and engaging the threaded end of the hub with a nut 44 which bears against a collar 45. y

The cylinder at has its inlet boss 24 connected with the source of gasolene supply and its outlet boss connected with the motor of the automobile, and in the present case,

sthe'in'let1boss124l is connected by the .pipe 30 withzthe .pipe 47 l-leadi'ng from the "tank 48 to the carburetor 49, which latter-is connected by pipe 50 with the manifold 51- of the -motor, not shown, and the outlet boss 25 is connected'by the-pipe 3-1-With the said manifold.

shown, the piston 18;.is moved on its suction stroke-in the direction ofthe. arrow 55, by

i e the spring 38, and in the opposite direction by the handor footof the operator-pressing upon the head Ad -On thesuction stroke @of the, piston gasolene; is I -.dr, awn through the pipe 30,-hollow boss v24L, passage 21;,into the j .chamber 12,.fr'0m whichit'passes into the 1 chamber-. 10. through 13116. openings 13 in the 20'. The valve;2 O'moves akially with the piston 18 and is seated when the piston is at, ,the end olf its suctionjstro'ke .asrepresented in Fig. At such time, the inlet check valve I wall or headp is closedbytheyalve 20,

,which also closes theinlet end of the outlet wall 0... The inlet check valve 26 is lifted fromits seat by. the suction of the piston 18.

.26 is closed and the, inlet. passage 21 in the ipassagie 2 2 and the cylinder a ischairged w-with gasolene orother priming fluid, and

the parts of the tpbaratus are in the condi.

tion shown in Fig; 2.

' lVhen it is -desiredvto prime the, motor, .the operator, pushes upon-thehead and moves thepiston 18-, and thevalve 20 in the direction of the arrow 60, the valve 20 be-.

ing thus moved away from its seat '36 seas toconnect the outlet'passage 22 with the cylinder a and permit the gasolene in the latter to be'forced by the piston out through the passage 22, hollowboss 25 and pipe 31 into the manifold 51, the outlet checkvalve 27 being opened by the gasol'ene forced through thepassage 22, asrepresented in.

Fig. 3. 1

On the discharge stroke of the piston, the spring 38 is compressed as represented Kin Fig.3, and as soon asjthe pressure is removed from the head 40, the spring 88 moves thepiston on its .suctionstroke, and

fgasolene is drawn from the pipe 3( into the cylinder 0 as above described. As the piston is moved on its suction stroke, the

. valve 20 being attached toit moves therewith toward its seat, so as to cut off the inlet and 'outletpassages 21, 22 from the cylinder when the piston reaches the end of its suction stroke, vOn the discharge stroke ofthe piston, the inlet check valve 26 is seated by its; spring 33 assisted by the pressure of the gasolene in: the cylinder. It will be observed that the valve 20, when closed, positively cuts off communication between thecylinder a and the motor, and ipractically seals the charge of gasolene in the cylinder and prevents the motor when In operation with the primer hereiir running from drawing gasolene from the cylinder. It is preferred to locate the inlet passage 21 in the wall -or head '0 and to close the same by the valve 20 when the latter is seated. This arrangement places "both the inlet and outlet passages under control :of the valve 20 and by loosely mounting the latter upon the rod 16 so as to tilt thereon, the valve can ad]ust itself to any slight irregularities or unevenness .in the valve seat which avoids the necessity of grinding or otherwise nicely finishing the valve seat.

7 .On the other hand, the valve 20 may be sweated or otherwise firmly secured .liq-

uid; tight on the rod 16, and the valve seat maybe ground or otherwise finished to conform to the valve. It is preferred to make the fluid inlet passage 21 in the wall or head 0 and thereby place it under the controlof the valve 2 0,"but it is not desired, to limit the invention to this particular location of the fluid inlet for the cylinder. r I t I I have herein shown one construction embodying the invention, but it'is not desired to limit the invention to the particular constructionshown. i t

An'apparatus of the character herein de scribed in which communication between the cylinderand its fluid outlet is cut ofi by means operatively connected with the piston to be positively moved thereby on the suction stroke of the said piston, is; not herein claimedas it forms subject-inatter of another application Serial Number 7 8747 filed by me February 16, 1 916.

1. In an apparatus of the character described, in.combination,a cylinder provided .with a wall having an opening extended through it and a passage leading from the rear face of said wall to the side of the cylinder, a piston in said cylinder, a rod attached to the said piston to move therewith and extended through said wall, a .valve on sa d rod movable therewith and a valve on said rod movable therewith and cooperating with the rearface of said wall to close the said passage on the suction stroke of said piston. p

r 3. In an apparatus of the character described, in combination, a cylinder provided with a wall and with a detachable cap forming with said wall a chamber, said chamher having a fluid inlet and a fluid outlet, and said wall having a passage connecting the said cylinder with said chamber, a piston in said cylinder having its piston rod extended through said wall into said chamber, a valve in said chamber movable with said piston rod and cooperating with said into said chamber, and a valve mounted on said piston rod within said chamber and cooperating with said outlet passage to close the same on the suction stroke of said piston.

5. In an apparatus of the character described, in combination, a cylinder provided with a fluid outlet and with a reciprocating piston, and a valve mounted on the piston rod of said piston and cooperating with said fluid outlet to close the same on the suction stroke of said piston.

6. In an apparatus of the character described, in combination, a cylinder provided with a fluid inlet and with a fluid outlet,

a'piston reciprocating in said cylinder, and a valve mounted on the piston rod of said piston to move therewith and cooperating with said fluid inlet and outlet to close the same on the suction stroke of said piston.

In testimony whereof, I have signed my name to this specification.

FREDERICK O. KILGORE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

